Nortel Networks 553-3001-211 manual QPC471 Clock Controller card, QPC471 vintage H, SW1 SW2 SW4

Page 142 of 894 Option settings

QPC471 Clock Controller card

Table 50 lists option settings for the QPC471 Clock Controller card.

Table 50

QPC471 vintage H

SW1

SW2

SW4

System

1

2

3

4

1

2

3

4

1

2

3

4

61C

on

on

on

on

off

off

off

off

off

on

*

*

81

off

off

off

off

off

off

off

off

off

on

*

*

81C

on

off

off

off

off

off

off

off

**

on

*

*

81C with Fiber Network

on

off

off

off

off

off

off

off

**

on

*

*

*Cable length between the J3

faceplate connectors:

0–4.3 m (0–14 ft)

off

off

4.6–6.1 m (15–20 ft)

off

on

6.4–10.1 m (21–33 ft)

on

off

10.4–15.2 m (34–50 ft)

on

on

* If there is only one Clock Controller card in the system, set to OFF. If there are two Clock Controller cards, determine the total cable length between the J3 connectors (no single cable can exceed 25 ft.) and set these two switch positions for this cable length, as shown above. The maximum total (combined) length is 50 ft. Set the switches on both cards to the same settings.

** Set to ON for clock controller 0. Set to OFF for clock controller 1.

Note: FNF based-systems the total clock path length is equal to the length of the NTRC49 cable used to connect between the two clock controller cards.

553-3001-211 Standard 2.00 September 2004